Boulogne-sur-Mer;br From Wikipedia, the free encyclopediabr "Bolougne" and "Boulogne, France" redirect here. For other places called Boulogne, see Boulogne (disambiguation).br Boulogne-Sur-Mer;br Courthousebr Boulogne-Sur-Merbr Location within Nord-Pas-de-Calais region [show]br Administrationbr Country; Francebr Region; Nord-Pas-de-Calaisbr Department; Pas-de-Calaisbr Arrondissement; Boulogne-sur-Merbr Intercommunality Communauté d'agglomération du Boulonnaisbr Mayor;Frédéric Cuvillierbr (2008–2014)br Statistics;br Land area; 8.42 km2 (3.25 sq mi)br Population; 44,859 (1999)br - Density; 5,328 km2 (13,800 sq mi)br INSEEPostal code; 62160 62200br 1 French Land Register data, which excludes lakes, ponds, glaciers 1 km² (0.386 sq mi or 247 acres) and river estuaries.br 2 Population without double counting: residents of multiple communes (e.g., students and military personnel) only counted once.br Coordinates: 50°43′35″N 1°36′53″Ebr Boulogne-sur-Mer (French pronunciation: [bu.lɔɲ.syʁ.mɛʁ]) is a city in northern France. It is a sub-prefecture of the department of Pas-de-Calais. The population of the city was 44,859 in the 1999 census, whereas that of the whole metropolitan area was 135,116.